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The missing or altered X chromosome of Turner syndrome causes errors during fetal development and other developmental problems after birth â short stature, ovarian failure and learning disabilities. Physical characteristics and health complications that arise from the chromosomal error vary greatly.
A normal female has 46 chromosomes, including 2 X-chromosomes (44XX). With Turnerâs syndrome, the female patient only has one X chromosome or has an abnormality in one of the X-chromosome. Some conditions only have a missing X chromosome in some cells, but not others. This condition is called Turnerâs mosaicism. Turnerâs syndrome occurs in 0.05% of the female population.